Operation Optimization of Steam Accumulators as Thermal Energy Storage and Buffer Units

被引:12
|
作者
Sun, Wenqiang [1 ,2 ]
Hong, Yuhao [1 ,3 ]
Wang, Yanhui [1 ]
机构
[1] Northeastern Univ, Sch Met, Dept Thermal Engn, Shenyang 110819, Peoples R China
[2] Northeastern Univ, State Environm Protect Key Lab Ecoind, Shenyang 110819, Peoples R China
[3] Hangzhou Boiler Grp Co Ltd, Dept Technol, Hangzhou 310021, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
steam accumulator (SA); optimal operation; minimum volume; steam source (SS); necessary thermal energy storage capacity (NTESC); RECOVERY;
D O I
10.3390/en10010017
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Although steam is widely used in industrial production, there is often an imbalance between steam supply and demand, which ultimately results in steam waste. To solve this problem, steam accumulators (SAs) can be used as thermal energy storage and buffer units. However, it is difficult to promote the application of SAs due to high investment costs, which directly depend on the usage volume. Thus, the operation of SAs should be optimized to reduce initial investment through volume minimization. In this work, steam sources (SSs) are classified into two types: controllable steam sources (CSSs) and uncontrollable steam sources (UCSSs). A basic oxygen furnace (BOF) was selected as an example of a UCSS to study the optimal operation of an SA with a single BOF and sets of parallel-operating BOFs. In another case, a new method whereby CSSs cooperate with SAs is reported, and the mathematical model of the minimum necessary thermal energy storage capacity (NTESC) is established. A solving program for this mathematical model is also designed. The results show that for UCSSs, applying an SA in two parallel-operating SSs requires less capacity than that required between a single SS and its consumer. For CSSs, the proposed minimum NTESC method can effectively find the optimal operation and the minimum volume of an SA. The optimized volume of an SA is smaller than that used in practice, which results in a better steam storage effect.
引用
收藏
页数:16
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